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Hello everyone, GRF Editor is an open-source tool for editing GRF files (https://github.com/Tokeiburu/GRFEditor). It offers a wide variety of features and customizations. The software is very stable and responsive, it can handle large operations without lagging your computer. How to install Download the zip archive provided from the download link at the bottom of this description or directly from there: http://www.mediafire.com/?aflylbhblrzpz0h Install the application with GRF Editor Installer.exe; if you are missing a .NET Framework you will be prompted to download it. Once you are done, you can start the program from the link on your desktop. Key features Overall speed is faster (or at least equal) than any GRF tool. Common operations: add, delete, merge, extract, preview, save. Undo and redo for any operation. It can open any GRF file format. Clean and very interactive interface. Saving formats supported : 0x300, 0x200, 0x103 and 0x102 (through the Settings page) and conversion to the Thor format. Instant filter and search options (example : "map .gat"). File association and context menus integration for .grf, .gpf, .rgz and .thor (through the Settings page). Can rebuild separated images into one file easily. Drag and drop (with the ALT key, can be modified in the Settings page). This is a big part of the software; most of the items can be moved around within the application itself or from/to Windows Explorer. If drag and drop does not work, it is most likely because you've started the program using administrator privileges. GRF Editor does not requires administrator privileges to run. Tools Grf validation: allows you to validate a GRF with multiple settings. It can detect corrupted GRF entries, invalid sprites, empty files, non-GRF files, duplicate files and a lot more. Flat maps maker: generates flat maps from .gat and .rsw files. Useful to generate WoE maps or to fasten up the loading time. Patch maker: generates a GRF patch based on two different GRFs. Hash viewer: shows the hash code (both CRC32 and MD5) for files. Image converter: converts an image to any format requested (BMP, PNG, JPG, TGA). GrfCL: used to create batch files (.bat) which can automate tasks on GRF files. See the content in GrfCL.rar in the download for more information. This tool can be customized from the sources as well. Grf encryption The encryption feature has been enabled again. It's similar to what it used to be and it has been tested on client versions ranging from 2012-08-01 to 2024-01-01. Some error messages will be displayed if necessary. If you have an issue, copy the error message (with the code, if there's one) and send me the client executable with the cps.dll file generated by GRF Editor. There shouldn't be compatibility issues anymore though! Thor files Thor files are patches used by Thor Patcher ( https://github.com/rathena/rathena/wiki/Thor-Patcher ). Because of their similarity with the GRF file structure, they have been integrated within GRF Editor. The primary utility of this feature is that it allows you to add encrypted files to a Thor patch. All the other options can be achieved by using Thor Maker. You'll find the necessary steps below, but test your patches before sending them off to players (I've done a lot of testing on my end, but better be safe). If you're using SecureGRF, then make a new GRF, add the files and encrypt it. In GRF Editor, open the encrypted GRF you just made, use "Save as" and name the new file with a .thor extension. That's it, if you want to change the output directory, click on Edit > Edit Grf/Thor settings. You can select the output mode and the GRF to merge the patch with. Simply save again if you change these properties. If you're using GRF Editor's encryption, then make a new Thor file (File > New > New Thor) and add the files you want to patch it with. Right-click on the files you want to encrypt and use Encryption > Encrypt. Technical stuff Requires .Net Framework 4.0 to run (4.0 or more will work as well). Automatically converts file name encoding to the currently selected encoding (you can change the encoding in the Settings page). Data virtualization is used as much as possible to preview files, meaning the files aren't completely loaded. Right-clicking an item will bring up the available options with that file. Preview file formats: txt, log, xml, lua, lub, bmp, png, tga, jpp, db, ebm, pal, gnd, rsw, gat, rsm, str, spr, act, imf, fna, bson, csv, ezv and wav. Services are "crash ready", meaning that you will be warned about a failed operation and no work will be lost (the application won't close and crash). It tries to continue operating even if it meets unsual conditions. Operations can be cancelled by clicking on the button near the progress bar. The warning level can be changed to avoid messages like "Please select a folder first." When prompted with an error, use Ctrl-C to copy the current dialog's content. Some screenshots! 1) Previewing an act file, while showing the search feature 2) Preview of a model file (rsm or rsm2) 3) Preview of GrfCL 4) Preview of maps 5) Preview of Grf validation 6) Search feature (press Ctrl-F or Ctrl-H to bring up within a text editor) Got a feedback? I'd gladly hear you out and fix issues you have with the program.